File line parsing

line_parser.c

#include <stdio.h>   /* required for file operations */
#include <string.h>      
#include <assert.h>
#include <stdlib.h>
FILE *fr;            /* declare the file pointer */

main()

{
	int n;
	char line[80];

	char *input, *input_port, *output, *output_port;
	int in_port, out_port;

	char *token, *string, *tofree, *in, *out;
	fr = fopen ("multicast.conf", "rt");  /* open the file for reading */

	/* multicast.conf example
	 * 239.192.1.1:1234\t239.192.2.1:1234
	 * 239.192.2.1:1234\t239.192.2.2:1234
	 */
	while(fgets(line, 80, fr) != NULL)
	{
		/* get a line, up to 80 chars from fr.  done if NULL */
		sscanf (line, "%ld", &elapsed_seconds);
		/* convert the string to a long int */
		//printf ("%s\n", line);

		tofree = string = strdup(line);

		in = strsep(&string, "\t");
		input = strsep(&in, ":");
		input_port = strsep(&in, ":");
		in_port = atoi(input_port);

		printf("input udp %s : %d\n",input, in_port);
		
		out = strsep(&string, "\t");
		output = strsep(&out, ":");
		output_port = strsep(&out, ":");
		out_port = atoi(output_port);

		printf("output udp %s : %d\n",output, out_port);

		free(in);
		free(out);
		free(tofree);
	}
	fclose(fr);  /* close the file prior to exiting the routine */
	
} /*of main*/